Grinding-wheel bearing disk



Patented Sept. ZZ, 1925.

PATENT orrlcEf.

ALBERT M. LEVERIGH, or MILWAUKEE, wIsooNsIn.

` enrnnINe-wnnnn `BEARING DISK.

Application led September 14, 1923i. 'Serial No. 662,718.

To all whom t may concern.'

Be it known that I, ALBERT M. Lnvrinron, a citizen of the United States,residing at Milwaukee, in the county of Milwaukee and State oflVisconsin, have invented new and useful Improvements in Grinding-dieciBearing Disks, of which the following is a specification.

This invention relates to grinding wheels, and more particularly togrinding wheel flanges, and an object of the invention is to provide aflange structure which will prevent the flying of parts of a grindingwheel in case the wheel is broken.

It is a well known fact, that frequently during the use of a grindingwheel it' will break and with the present construction of flanges ordisks used in bracing the Wheel and connecting it to the driving shaft,the pieces broken from the wheel are permitted to fly, during therotation of the wheel often striking` workmen and injuring them.l and itis an object of the present invention to provide a novel, simpleconstruction of fiange which will prevent the flying of the particles ofthe grinding wheel in that gripping members are carried by the flangewhich will move into tight binding or gripping engagement with a portionof the grinding wheel in case the latter portion moves outwardly fromthe axis of the wheel.

Other objects of the invention will appear in the following detaileddescription taken in connection with the accompanying drawing whereinFig. 1 is across section through a grinding wheel showing the improvedflange associated therewith.

Fig. 2 is an enlarged detail section through a part of the flange. yFig. 3 is a section through a modified form of flange showing itapplied.

Fig. 4L is a detail end view ofthe gripping member used in the modifiedform of the invention.

Fig. 5 is a` detail side elevation of the grip ping member used in themodified form.

Referring more particularly to the drawings, a grinding wheel 1 of anyapproved type, such as an emery wheel is shown which has clamped theretothe flanges or bearing disks 2 and 3. The bearing disks 2 and 3 areconnected to the wheel 1 in the usual manner, preferably by means ofscrews, and

they are also provided with the usual form of central bearing opening4l. The disk 2 is ofl the approved type,` commonly inuse having its flatinner surface bearing against the grinding wheel l@ The flange3,"however, is provided with cutout portions 5 at circumferentiallyspaced points, extending? inwardlyfrom its innerl surface, inwardlylofthe perimeter of the disk. The'innerwalls 7 kof the recesses 5 inclineinwardly towards the inner face'of the rdi'sk` asthey extend outwardlytowards its.perimeterlasiclearly shown in Fig l of the drawings.Gripping rollers 8 are mounted orv placed inthe recesses 5 and normallyrest in the innerldeep portion of the recesses. The rollers 8 aresubstantially of the same diameter as the depth of the deep portionsofthe recesses 5 so that they will just engage the side of the grindingwheel l. In case the grinding wheel breaks and a segment thereofloosens, the rotation of the grinding wheelwill cause the broken loosensection to move outwardly from the center of the wheel. On such outwardmovement, it will move the roller 8 outwardly therewith and thecentrifugal force created by the rotation of the wheel will cause atight wedging action of the rollers 8 against the broken part of thegrinding wheel and wedge it tightly against the flange 2 therebypreventing the broken part from flying off.

In Figs. 3 to 5 of the drawings a modified forni of the invention isshown in which the flange or disk 3 is provided with cut out portions 5which are triangular shaped in cross section and which have tip-standingridges 10 formed therein which engage in the longitudinally extendinggrooves 11 in the gripping blocks 12.` The vgripping blocks 12 replacethe gripping rollers 8 and they are substantially frusto-pyramidal inshape being triangular in end elevation and substantiallyfrustotriangular in side elevation. The blocks l2 normally rest inwardlyin the inner deep portions of the cut out portions 5 and move outwardlyinto gripping engagement with the grinding wheel in case a portion ofthe wheel breaks and moves outwardly in the same manner in which thegripping rollers 8 cooperate to prevent the broken part of the grindingwheel from flying outwardly.

It is, of course, to be understood that the invention may be constructedin other manners and the parts associated in different CII relationsand, therefore, I do not desire to he limited in any manner except asset forth in the claims hereunto appended.

y Having thus described my invention what I claim is l. As a new articleof .manufactura a bearing disk, for grinding wheels provided with ayplurality of recesses in its inner face, said recesses having theirbottoms inclining outwardly towards the inner face as they extendtowardthe periphery of the disk, and grinding wheel gripping members movablymounted in said recesses.

2. The combination with a grinding wheel, of a bearing flange havingrecesses in its inner face', said recesses having their bottomsinclined; outwardly and gripping memhers'movably mounted in saidrecesses.

3. IThe combination with a grinding wheel, of a. bearing disk thereforprovided with" a plurality of recesses extending in* Ywvardly from itsinner face and having their bottoms inclining inwardly towards the innerface of the disk as they extend outwardly towards the periphery of thedisk, gripping rollers mounted in said recesses and normally out ofgripping engagement with the grinding wheel, said rollers adapted to bekforced into gripping engagement upon movement of any portion of thegrinding wheel outwardly from its axis.

4. The combination with a grinding wheel, of a bearing disk therefore,provided with a plurality of recesses extending inwardly from its innerface and having their bottoms inclining inwardly towards the inne-r faceof the disk as they extend outwardly towards the periphery of the disk,gripping blocks mounted insaid recesses and normally out of grippingengagement with the grinding wheel, said blocks adapted to be forcedinto movement of any portion ot' the grinding wheel outwardly from itsaxis.

In testimony whereof I affix my signature.

, ALBERT M. LEVERICH.

gripping engagement upony

